/ Dictionary / Index F fosse: Meaning and Definition of Find definitions for: fosse Pronunciation: (fos, fôs), [key] — n. a moat or defensive ditch in a fortification, usually filled with water. any ditch, trench, or canal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fosse (Thesaurus) fossarian fossette Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language